Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an auto mobile tire showing my design;

FIG. 2 is a front view thereof.

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a fragmentary enlarged front view surrounded by lines 6-6 in FIG. 2 thereof;

FIG. 7 is a section view taken along line 7-7 in FIG. 6 thereof;

FIG. 8 is a section view taken along line 8-8 in FIG. 6 thereof; and,

FIG. 9 is reference view.

In FIG.9, the solid contrast is for the purpose of highlighting the grooves. The dark gray contrast is for the purpose of highlighting the deepest grooves, and the light gray contrast is for the purpose of highlighting the less deep grooves.

In the drawings, the broken line are for defining the sidewall, inner bead and the boundary between the claimed tire tread and the unclaimed sidewall, and from no part of the claimed design. 

CLAIM I claim the ornamental design for tread portion of an automobile tire, as shown and described. 